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An Adaptive JPEG Double Compression Steganographic Scheme Based on Irregular DCT Coefficients Distribution

Ju Jia, Zhaoxia Xiang, Lina Wang, Yan Xu • IEEE Access (2019)

Steganography is to embed secret information into digital media and minimize the distortion caused by data embedding. The JPEG is a widely used image compression format, and many JPEG images transmitted on the network are double compressed....

DOAJ Open Access (DOAJ) DOI: 10.1109/ACCESS.2019.2926226

The Temporal-Based Forest Disturbance Monitoring Analysis: A Case Study of Nature Reserves of Hainan Island of China From 1987 to 2020

Han Xiao, Han Xiao, Xiaoqian Zhang, Xiaoqian Zhang et al. • Frontiers in Environmental Science (2022)

Forest disturbance monitoring can provide scientific data for the decision making and management of nature reserves. LandTrendr algorithm has been applied to identify forest disturbances on a long-time scale through appropriate segmentation...

DOAJ Open Access (DOAJ) DOI: 10.3389/fenvs.2022.891752

Optimizing runoff prediction in plains river network areas: a hybrid XAJ-BP modelling framework with basin structure division

Xu Cheng, Shiqiang Wu, Jiangyu Dai, Xiufeng Wu et al. • Engineering Applications of Computational Fluid Mechanics (2026)

The plain water network area is characterized by its flat terrain and a dense crisscrossing of rivers. The runoff process in this region is significantly influenced by human activities, resulting in a complex relationship between water stor...

DOAJ Open Access (DOAJ) DOI: 10.1080/19942060.2026.2749141

Determination of the cost-benefit efficient interval for sponge city construction by a multi-objective optimization model

Changmei Liang, Changmei Liang, Changmei Liang, Changmei Liang et al. • Frontiers in Environmental Science (2023)

The cost-benefit is a key factor when selecting an appropriate sponge city construction scheme. The research of applying intelligent technology to find cost-benefit efficient planning and construction of sponge city is urgently required. Th...

DOAJ Open Access (DOAJ) DOI: 10.3389/fenvs.2022.1072505

A robust and uncertainty-aware machine learning framework for PM2.5 prediction in a coastal urban Indian environment: implications for sustainable air quality management

Salvator Lawrence, Srimuruganandam Bhathmanabhan • Sustainable Environment Research (2026)

Abstract Accurate prediction of fine particulate matter (PM2.5) remains challenging because atmospheric processes are nonlinear, nonstationary, and influenced by temporal variability, measurement uncertainty, and episodic pollution events. ...

DOAJ Open Access (DOAJ) DOI: 10.1186/s42834-026-00296-y

In-Situ Monitoring and Prediction of Frost Growth on Plant Leaves Based on Dielectric Spectrum Analysis and an SWT-SSA-LSTM Model

Huan Song, Lijun Wang, Yuguo Gao, Shuman Guo et al. • AgriEngineering (2026)

Accurate and in-situ monitoring of frost growth on plant leaves is crucial for disaster prevention in smart agriculture. To address the limitations of traditional methods in quantification and continuity, this study proposes a novel monitor...

DOAJ Open Access (DOAJ) DOI: 10.3390/agriengineering8020067

Adaptive Tracking Control of Anchoring Unit for Pipeline Intelligent Plugging Robot Based on Improved Deep Deterministic Policy Gradient

Tingting Wu, Yaxin Liu, Laihe Qi, Pu Wang et al. • Machines (2026)

A pipeline intelligent plugging robot (PIPR) is an important tool in subsea pipeline maintenance and emergency repair. Precise position-tracking control is crucial for the in-pipe plugging operation of a PIPR. The anchoring module is the ke...

DOAJ Open Access (DOAJ) DOI: 10.3390/machines14060675

A Novel Efficient Method for Land Cover Classification in Fragmented Agricultural Landscapes Using Sentinel Satellite Imagery

Xinyi Li, Chen Sun, Huimin Meng, Xin Ma et al. • Remote Sensing (2022)

Updated and accurate land cover maps are essential and crucial for sustainable crop production and efficient land management. However, accurate and efficient land cover mapping is still a challenge for agricultural regions with complicated ...

DOAJ Open Access (DOAJ) DOI: 10.3390/rs14092045

URBAN PUBLIC TRANSPORT WITH THE USE OF ELECTRIC BUSES – DEVELOPMENT TENDENCIES

Stanisław KRAWIEC, Bogusław ŁAZARZ, Sylwester MARKUSIK, Grzegorz KAROŃ et al. • Transport Problems (2016)

The programing documents of the European Union determine the direction of transport systems development, including large cities and agglomerations. The context of these actions which aim to transform into ecologically clean and sustainable ...

DOAJ Open Access (DOAJ) DOI: 10.20858/tp.2016.11.4.12

Point of Care Ultrasonographic Life Support in Emergency (PULSE)—a quasi-experimental study

Noman Ali, Abdul Ahad Chhotani, Sannia Perwaiz Iqbal, Salman Muhammad Soomar et al. • International Journal of Emergency Medicine (2023)

Abstract Background Many physicians use point-of-care ultrasound (PoCUS) in their clinical practice to improve their diagnostic capabilities, accuracy, and timeliness. Over the last two decades, the use of PoCUS in the emergency room has dr...

DOAJ Open Access (DOAJ) DOI: 10.1186/s12245-023-00525-w

An enhanced model predictive control method for single-stage three-phase transformerless grid-connected photovoltaic inverter

Zhonglin Guo, Zhijie Liu, Miao Guo, Ke-Jun Li et al. • International Journal of Electrical Power & Energy Systems (2025)

The single-stage transformerless photovoltaic (PV) topology is an attractive configuration as it offers high efficiency, low installation cost and smaller size. For such a configuration, the control algorithm should be designed to track the...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.ijepes.2025.111239

Evaluating the impact of urban traffic patterns on air pollution emissions in Dublin: a regression model using google project air view data and traffic data

Pavlos Tafidis, Mehdi Gholamnia, Payam Sajadi, Sruthi Krishnan Vijayakrishnan et al. • European Transport Research Review (2024)

Abstract Air pollution is a significant and pressing environmental and public health concern in urban areas, primarily driven by road transport. By gaining a deeper understanding of how traffic dynamics influence air pollution, policymakers...

DOAJ Open Access (DOAJ) DOI: 10.1186/s12544-024-00671-z

Parabolic Equation Modeling of Propagation over Terrain Using Digital Elevation Model

Xiao-Wei Guan, Li-Xin Guo, Ya-Jiao Wang, Qing-Liang Li • International Journal of Antennas and Propagation (2018)

The parabolic equation method based on digital elevation model (DEM) is applied on propagation predictions over irregular terrains. Starting from a parabolic approximation to the Helmholtz equation, a wide-angle parabolic equation is deduce...

DOAJ Open Access (DOAJ) DOI: 10.1155/2018/1878307

Perturbative spacetimes from Yang-Mills theory

Andrés Luna, Ricardo Monteiro, Isobel Nicholson, Alexander Ochirov et al. • Journal of High Energy Physics (2017)

Abstract The double copy relates scattering amplitudes in gauge and gravity theories. In this paper, we expand the scope of the double copy to construct spacetime metrics through a systematic perturbative expansion. The perturbative procedu...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP04(2017)069

Tema 1: Refitting existing simulations to meet with new learning objectives – from supply chain management to virtual collaboration

Timo Leinema, Thomas Duus Henriksen, Eeli Saarinen • Læring og Medier (2012)

This paper discusses the application possibilities of business simulation games in teaching. By application possibilities we mean the different ways of arranging the learning sessions using the one and same simulation game. Thus, we are not...

DOAJ Open Access (DOAJ) DOI: 10.7146/lom.v5i9.6418

Evaluation of artificial intelligence technology success factors for an effective supply chain using interval-valued intuitionistic fuzzy AHP method

Gülçin Büyüközkan, Celal Alpay Havle • Afyon Kocatepe Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dergisi (2026)

The increasing complexity of supply chains in today's globalizing world has increased the importance of effective supply chain management. Consequently, businesses increasingly rely on new technologies to maintain flexibility, efficiency, a...

DOAJ Open Access (DOAJ) DOI: 10.33707/akuiibfd.1689304

HIV incidence among sexual health clinic attendees in England: First estimates for black African heterosexuals using a biomarker, 2009-2013.

Adamma Aghaizu, Jennifer Tosswill, Daniela De Angelis, Helen Ward et al. • PLoS ONE (2018)

IntroductionThe HIV epidemic in England is largely concentrated among heterosexuals who are predominately black African and men who have sex with men (MSM). We present for the first time trends in annual HIV incidence for adults attending s...

DOAJ Open Access (DOAJ) DOI: 10.1371/journal.pone.0197939